Improvement in stereotype-blocks



AQPIEDHYHTG-` Stereotype-Block.

No. 205,268. Patented June `25, 1878.A

WIITNBssBs: l l INVENTOR:

ATTORNEYS.

N PETERS. PHDTo-LITHOGRAPHER. wASHvNGTcN, D. C.

UNITED STATES PATENT OEEICE.

AMANDUS HENNING, OF, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHT TO 'DANIELS. DE VINNE, OF BROOKLYN, N. Y.

IMPROVEMENT IN ls'rEFn-:OTYPE-BLOCKS.

Specification forming part of Letters Patent N0. 205,268, dated June 25,1878 application led May 25, 187e.

To all whom it may concern:

Be it known that I, AMANnUs HENNING, of the city, county, and State ofNew York, have invented a new and Improved Stereotype- Block, of whichthe following is a specification:

Figure l is a plan view, partly in section, of my improvedstereotype-block. Fig. 2 is a detail sectional View taken on line a: xin Fig. 1.

Similar letters of reference indicate corresponding parts.`

The invention will first be described in connection with the drawing,and then pointed out in the claim.

When stereotype-plates are secured to their blocks by the common method,and it is desired to adjust one of them in a form, itis necessary tounlock the entire form, thereby e11- dangerin g the arrangement of theother blocks in the form, so that it frequently becomes necessary toreadjust the form.

Another difficulty common to the ordinary method of holdingstereotype-plates is, that the face of the plate, near its edges, isoften injured by the tools employed in fastening the blocks and lockingthe form.

To obviate these difculties, and to furnish a means of securelyfastening and easily adjusting the plates after the form is locked, isthe aim of my invention.

In the drawing, A represents a block, of suitable thickness, forsupporting the stereotype-plate B, and C C are adjustable jaws upon theupper surface of the block. In the present example there are two jawsnear each side, and one near each end; but I do not conine myself tothis number or arrangement. Each jaw O is pivoted to a follower, D, thatslides in ways formed in the block, and is supported and guided by apin, a, that slides in a hole formed in the body of the block. Thefollower D is offset and beveled to adapt it to awedge, E, which slidesin a casing formed in or attached to the side of the block. The wedgecarries a rack, e, upon its outer side, which is engaged by a pinion, F,whose squared arbor extends upward through a hole in the top plate ofthe block to receive a key, by which the clamping device is operated.The wedge has in its under side a slot, which is parallel with the rack,for receiving a guidepin, b, that projects from the wedge-casing. In theupper side of the wedge there is a slot, c, for receiving a pin, d, thatprojects from the under side of the follower D.

By turning the pinion so as to throw the wedge forward the jaw O iscarried toward the middle of the block, and by turning the pinion in theopposite direction the jaw is retracted by the engagement of the pin dby the slot c.

The face of the jaw that engages the edge of the stereotypeplate isundercut to correspond with the beveled edge of the plate.

It will be observed that the jaws will accommodate themselves to theedges of the plate, whether the latter be arranged parallel with thesides of the block or diagonally.

It will also be seen that the plate on any block in a form composed ofmy improved blocks may be adjusted without disturbing any of the others.l

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with the block A, of the pivotedjaws C, sliding followers D, and sliding wedges E, operated by rack andpinion, as and for the purpose specified.

AMANDUS HENNING.

Witnesses C. SEDGwrcK, GEO. M. HorKINs.

